咬合により歯牙の受ける衝撃加速度に関する研究
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概要
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Miniturized accelerometers were used to detect the tooth vibration during the motions of opening and closing jaws in this study. During recording procedure, accelerometers were retained with socketto the buccal surface of maxillary tooth. This method does not disturb normal mandibuler movements keeping natural tooth as it is. The purpose of this study was to develop practical use of this method in assessment of occlusion. Twenty-two male subjects were selected for this study, their age range was from 23 to 34. Each subject possessed a full complement of tooth. They were subjected to (1) influence of head posture (Subject No.1), (2) value of acceleration response (No. 2〜6), (3) observation of occlusion and separation waves (No. 7〜16), (4) examination of uniatleral mastication (No. 17〜19), (5) synchronous records from effect of occlusion by inlay restration (No. 20〜22). From this observation the following summary can be obtained. (1) The "slight" change in head posture had little on the value of acceleration response. (2) Tooth transient vibration during jaw closing showed many vertical vibratory motions. (3) Propagation waves were obtained from anterior tooth during jaw closing, may be the determining factor on tooth contacts. (4) Basic components of separation waves were single impact, slide and combined forms. (5) Subjects of unilateral preference pattern of mastication on the first molar were proved many vertical vibratory motions in its side, and occlusal waves were short duration. (6) Synchronous records may be made of use in future studies.
- 社団法人日本補綴歯科学会の論文
- 1972-10-30